can there be more documenation with a small (but working) example script on how to use this ?
Some issues (Ive seen the "same" code example in dozens of tutorials):-
( I'll use capitals for emphasis only)
QUESTION: what does D:T:O mean ? UNEXPLAINED.
QUESTION: Do we *ONLY* use these 3 lines in a self-contained script ? Does this log ALL future MYSQL commands ?
QUESTION :- Do we put that one line just
- immediately after we connect to MYSQL ?
- before we connect to MYSQL ?
- before our suspected error ?
mysqli::debug
mysqli_debug
(PHP 5, PHP 7, PHP 8)
mysqli::debug -- mysqli_debug — Effectue des actions de débogage
Description
Style orienté objet
Style procédural
Effectue des actions de débogage en utilisant la bibliothèque de débogage Fred Fish.
Liste de paramètres
-
options -
Une chaîne de caractères représentant l'opération de débogage à effectuer.
La chaîne de contrôle de débogage est une séquence de champs séparés par deux points, comme suit :
<field_1>:<field_2>:<field_N>
,facultatif et d'une liste de modificateurs séparés par des virgules :flag[,modifier,modifier,...,modifier]Caractères de drapeau reconnus optionscaractèreDescription O MYSQLND_DEBUG_FLUSHA/a MYSQLND_DEBUG_APPENDF MYSQLND_DEBUG_DUMP_FILEi MYSQLND_DEBUG_DUMP_PIDL MYSQLND_DEBUG_DUMP_LINEm MYSQLND_DEBUG_TRACE_MEMORY_CALLSn MYSQLND_DEBUG_DUMP_LEVELo output to file T MYSQLND_DEBUG_DUMP_TIMEt MYSQLND_DEBUG_DUMP_TRACEx MYSQLND_DEBUG_PROFILE_CALLS
Valeurs de retour
Retourne toujours true.
Historique
| Version | Description |
|---|---|
| 8.0.0 |
Cette fonction retourne désormais toujours true. Auparavant, elle retourne false en cas d'échec.
|
Exemples
Exemple #1 Génération d'un fichier de "traces"
<?php
/* Génère un fichier de "trace" dans '/tmp/client.trace' sur la machine (cliente) locale : */
mysqli_debug("d:t:o,/tmp/client.trace");
?>Notes
Note:
Pour utiliser la fonction mysqli_debug(), vous devez compiler la bibliothèque cliente MySQL avec le support du débogage.
Voir aussi
- mysqli_dump_debug_info() - Écrit les informations de débogage dans les logs
- mysqli_report() - Alias de mysqli_driver->report_mode
add a note
User Contributed Notes 3 notes
Peter ¶
10 years ago
riversnowchang at gmail dot com ¶
6 years ago
Here are the information about debug options on mysqli_debug()
O,o:MYSQLND_DEBUG_FLUSH
A,a:MYSQLND_DEBUG_APPEND
F:MYSQLND_DEBUG_DUMP_FILE
L:MYSQLND_DEBUG_DUMP_LINE
m:MYSQLND_DEBUG_TRACE_MEMORY_CALLS
n:MYSQLND_DEBUG_DUMP_LEVEL
o:output to file
T:MYSQLND_DEBUG_DUMP_TIME
t:MYSQLND_DEBUG_DUMP_TRACE
x:MYSQLND_DEBUG_PROFILE_CALLS
f:? still investigating
For example, mysqli_debug("T:n:t:m:x:F:L:o,/tmp/client.trace");
mysqlnd will write Time, Level, trace, memory calls, profile calls, File, Line to client.trace file.
22:35:42.704501 ../mysqlnd_connection.c: 269 0:>mysqlnd_connection_init
22:35:42.704538 ../mysqlnd_driver.c: 10 1:| >mysqlnd_driver::get_connection
22:35:42.704549 ../mysqlnd_driver.c: 10 2:| | info : persistent=1
22:35:42.704558 ../mysqlnd_alloc.c: 21 2:| | >_mysqlnd_pecalloc
22:35:42.704570 ../mysqlnd_alloc.c: 23 2:| | <_mysqlnd_pecalloc (total=3 own=3 in_calls=0)
22:35:42.704602 ../mysqlnd_alloc.c: 21 2:| | >_mysqlnd_pecalloc
22:35:42.704626 ../mysqlnd_alloc.c: 23 2:| | <_mysqlnd_pecalloc (total=2 own=2 in_calls=0)
22:35:42.704650 ../mysqlnd_connection.c: 15 2:| | >mysqlnd_error_info_init
22:35:42.704675 ../mysqlnd_connection.c: 10 3:| | | >mysqlnd_error_info::reset
22:35:42.704697 ../mysqlnd_connection.c: 10 3:| | | <mysqlnd_error_info::reset (total=1 own=1 in_calls=0)
22:35:42.704725 ../mysqlnd_connection.c: 16 2:| | <mysqlnd_error_info_init (total=51 own=50 in_calls=1)
22:35:42.704744 ../mysqlnd_connection.c: 21 2:| | >mysqlnd_connection_state_init
If there is anything wrong, please let me know.
Domenic ¶
6 years ago
Looks like this manual could be referred to:
http://tiebing.blogspot.com.au/2011/10/cc-dbug-library.html
(I haven't tested it)
